The present article analyzes the ways in which the issue of the legitimacy of royal power emerges in Vindiciae contra Tyrannos (1579) in the context of the French Wars of Religion. This study specifically shows how the concept of the exercise of king?s power together with its ample desecration becomes central to the text, particularly in connection with the hereditary succession of the prince?s power. In this regard, the analysis highlights the way in which these arguments develop prior to the appearance of the theories of Absolute Monarchy.